Method of making cans.



G. E. BERTELS.

METHOD OF MAKING CANS. APPLICATION FILED SEPT; 6, 1910.

1 0133366, Patented Jan. 2, 1912.

Witnesses 0 a I 2 Wm STATES aaricirr orator...

CHARLES BEB'IELS, OF WILKES-BARBIE, PENNSYLVANIA.

EETHQD OF MAKING- CANS.

Specification of Letters Patent.

Patented J an. 2, 191 2.

To all whom it may concern:

Be it known that I, GnARnns E. BERTELB, a citizen of theUnited States,residing at Wilkes-Barre, in the county of Luzerne and State ofPennsylvania, have invented a new and useful Method of Making Cans, ofwhich the following is a specification.

This invention relates to a new and useful method of manufacturing cans,the object of the invention being to produce what is known as a seamlesscan in a simple, practical, thoroughly feasible and efiicient manner andin the smallest possible number of operations.

The operation, briefly outlined, consists in forming the can body in anysuitable manner; stamping the bottom of the can from a metal blank insuch manner as to produce an upstanding flange thereon; severing theflange from the bottom; securing the bottom to one end of the can body;and securing the flange to the other end of the-can body so as to serveas a seamless rim therefor.

It is to be understood that changes in the method as herein describedand illustrated, can be madewithin the scope of the appended claimswithout departing from the spirit of the invention.

The process is described in detail in connection with the accompanyingdrawings forming part of this specification, in which:-

Figure 1 is a plan view of a sheet metal blank from which the can bodyis rolled and soldered, the dotted line indicating the portion which isto be subsequently bent inward in the form of a flange to secure thebottom of .thecan in position. .Fig. 2 is a side elevation of the canbody after it has been rolled up from the blank shown in Fig. 1 andsoldered along the seam. Fig. 3 is a plan view of the circular blank.from which the bottom of the can and the seamless rim thereof aresimultaneously stamped or swaged. Fig. 1: is a sectional view throughthe swaged bottom and seamless rim before they have been severed fromeach other, showing particularly the manner in which the flange orseamless rim is swaged in two different annular sizes, so that oneportion ofthe flange or rim will be larger than the other portionthereof. Fig. 5 is a view similar to Fig. 1 just after the bottom hasbeen severed from the-aflangepr seamless Fig. 6 is a detail sectionalview showing the seamless rim after its smaller end has been headed andthe rim has been ink verted and fitted over the end of the can bodyillustrated in Fig. 2 in position to be soldered or otherwise securedthereon. Y Fi 7 is a plan view of the blank from which the cap orclosure of the can is' stamped. Fig. 8 1s a vertical section through thecompleted can showing the manner in which the lower end of the canbottomis rolled in to secure the body in position,'and showin cap orclosure fitted downward inslde of the seamless rim. 5

In carrying out the method of the present invention, the can body 1,illustrated 1h Fig. 2, is formed from a suitable sheet metal blank'shownin Fig. 1 by merely rolling the blank into the form. of a cylinder withthe ends 2 thereof overlapping, and soldering or otherwise securing the.ends together. The seamless rim 3 and the bottom 4 of the can, aresimultaneously stamped or swaged from a single blank of metal asillustrated in Fig. 3. In thus stamping or swaging the bottom 4 and rim3, the latter is preferably formed with an annular enlargement 3 at itsupper end, and off-set at 3 from the lower and smaller portion 3thereof. After the seamless rim and bottom have been thus formed, theyare severed or separated from each other in any suitable manner asindicated in Fig. 5. The smaller end 3 of the rim is then curled orbeaded at 3 and the rim is inverted and fitted over the upper end of thecan body 1 asclearly' shown in --F1g. 6, the annular enlargement 3 ofthe rim being ofthe proper size to fit over the upper end of the canbody, the smaller portion 3 being of the same diameter as the can body 1so as to form in effect a seamless extension. thereof. The flange 3? ofthe rim is soldered or otherwise suitably secured to the can body 1. v i

The bottom 4. of the can is fitted into the can body 1 as shown in Fig.8 and the lower end of the can body is rolled on the dotted line 10-,shown in Figs. 1 and 2 so as to form an inwardly directed flange 10'which serves to hold the bottom 4 securely in position, the can body 1being also inwardly beaded or ribbed at 11 above the bottom 4: toprevent upward displacement thereof.

The cover or closure 9 of the can is swaged or stamped from a singleblank shown in Fig. 7,.and is..formed.with an upstanding flange 10having the upper end thereof beaded or outwardly curled at 11. Theflange 10' and also the Y stand a pressure of 35j'pounds to the squareinch without permitting a leak, or the disconnection of theclosure 9from the rim.

What is claimed as newv is 1.. The method of manufacturing cans whichconsists in suitably producing the can body, forming the proposed bottomof the can with a flange thereon, severing the flange and bottom fromeach other; securing the bottom to the lower end of the can body,forming one edge of the'flange with an outturned bead and securing theflange to the upper end of the can body to serve as a seamless rimtherefor.

2. The method of manufacturing cans which consists in suitably producingthe can body, forming the proposed bottom of the can with a flangehaving annular portions of different sizes, severing the flange and thebottom from each other, securing the" r bottom to; the lower end ofthe-can body,

forming one edge'of the flange with an. outturned bead and securing theother end of the flange to the upper end of the can body to serve as aseamless rim therefor.

3.The method of manufacturing cans which consists in suitably producingthe can body, stamping the proposed bottom of the can with a flangehaving an annularly enlarged upper end, severing the flange and thebottom from each other, securing the bottom to the canbody and rollingsaid can body inward above and below the bottom to hold 'it in place,inverting the flange so as to fit the annularly enlarged upper endthereof over the upper end of the can body, forming one end of theflange with an outturned bead and securing the other end of the flangetothe can body, so as to cause thesame to serve as a seamless rimtherefor.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence of two witnesses.

, CHARLES E. BERTELS.

Witnesses:

FRANK B. OGHSENREITER, WILLIAM CRIcH'roN CLARKE.

